Cap for a bottle



FIG. 1 is an isometric view embodying our new design;

FIG. 2 is top planar view thereof;

FIG. 3 is a front planar view thereof;

FIG. 4 is a right side planar view thereof;

FIG. 5 is a left side planar view thereof;

FIG. 6 is a rear planar view thereof; and,

FIG. 7 is a bottom planar view thereof. 

The ornamental design for a cap for a bottle, as shown and described. 